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/*
Copyright (C) 2006,2007 John Anderson
Copyright (C) 2012 Paul Davis
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <cmath>
#include "pot.h"
#include "surface.h"
#include "control_group.h"
using namespace ArdourSurface;
using namespace Mackie;
int const Pot::External = 0x2e; /* specific ID for "vpot" representing external control */
int const Pot::ID = 0x10; /* base value for v-pot IDs */
Control*
Pot::factory (Surface& surface, int id, const char* name, Group& group)
{
Pot* p = new Pot (id, name, group);
surface.pots[id] = p;
surface.controls.push_back (p);
group.add (*p);
return p;
}
MidiByteArray
Pot::set (float val, bool onoff, Mode mode)
{
// TODO do an exact calc for 0.50? To allow manually re-centering the port.
// center on if val is "very close" to 0.50
MIDI::byte msg = (val > 0.48 && val < 0.58 ? 1 : 0) << 6;
// Pot/LED mode
msg |= (mode << 4);
/*
* Even though a width value may be negative, there is
* technically still width there, it is just reversed,
* so make sure to show it on the LED ring appropriately.
*/
if (val < 0){
val = val * -1;
}
// val, but only if off hasn't explicitly been set
if (onoff) {
if (mode == spread) {
msg |= (lrintf (val * 6)) & 0x0f; // 0b00001111
} else {
msg |= (lrintf (val * 10.0) + 1) & 0x0f; // 0b00001111
}
}
/* outbound LED message requires 0x20 to be added to the LED's id
*/
return MidiByteArray (3, 0xb0, 0x20 + id(), msg);
}
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